main.dart

import 'package:flutter/material.dart';
import 'package:http/http.dart' as http;
import 'dart:async';
import 'dart:convert';


void main() => runApp(MyApp());
String url = "https://jsonplaceholder.typicode.com/posts/1";
// For Http Request Here ok bro
Future<Post> fecthPost() async {
  final response = await http.get(url);
  if (response.statusCode == 200 ) {
    return Post.fromJson(json.decode(response.body));
  }else{
    throw Exception('Failed to make request');
  }
}

// Make Claa Post Model
class Post {
    final int userId;
    final int id;
    final String title;
    final String body;

    Post({this.userId, this.id, this.title, this.body});

    factory Post.fromJson(Map<String, dynamic> json) {
      return Post(
        userId: json['userID'],
        id: json['id'],
        title: json['title'],
        body: json['body']
      );

    }

}

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        // This is the theme of your application.
        //
        // Try running your application with "flutter run". You'll see the
        // application has a blue toolbar. Then, without quitting the app, try
        // changing the primarySwatch below to Colors.green and then invoke
        // "hot reload" (press "r" in the console where you ran "flutter run",
        // or simply save your changes to "hot reload" in a Flutter IDE).
        // Notice that the counter didn't reset back to zero; the application
        // is not restarted.
        primarySwatch: Colors.red,
      ),
      home: MyHomePage(title: 'Get API'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  // This widget is the home page of your application. It is stateful, meaning
  // that it has a State object (defined below) that contains fields that affect
  // how it looks.

  // This class is the configuration for the state. It holds the values (in this
  // case the title) provided by the parent (in this case the App widget) and
  // used by the build method of the State. Fields in a Widget subclass are
  // always marked "final".

  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> with TickerProviderStateMixin {
  // Make constructor
  final Future<Post> post = fecthPost() ;

  @override
  Widget build(BuildContext context) {
    // This method is rerun every time setState is called, for instance as done
    // by the _incrementCounter method above.
    //
    // The Flutter framework has been optimized to make rerunning build methods
    // fast, so that you can just rebuild anything that needs updating rather
    // than having to individually change instances of widgets.
    return Scaffold(
        appBar: AppBar(
          // Here we take the value from the MyHomePage object that was created by
          // the App.build method, and use it to set our appbar title.
          title: Text(widget.title),
        ),
        body: Center(
          child: FutureBuilder<Post>(
            future: post,
            builder: (context, snapshot){
              if(snapshot.hasData){
                print(snapshot.data.title);
                return Text(snapshot.data.title, textAlign: TextAlign.center,  style: TextStyle(fontWeight: FontWeight.bold, color: Colors.red, fontSize: 20.0));
              }
              else if(snapshot.hasError){
                return Text("${snapshot.error}", style: TextStyle(fontWeight: FontWeight.bold),);
              }
              else{
                return CircularProgressIndicator(backgroundColor: Colors.amber,);
              }
            },

          ),
        )
    );
  }
}